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Myles Lewis, Chieri Kubota, Russell Tronstad, and Young-Jun Son

Vegetable grafting was recently introduced in North America and has attracted interest from various stakeholders. The technology has been practiced for hundreds of years since it was first used for increasing the fruit size of gourds in China during

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Chieri Kubota, Michael A. McClure, Nancy Kokalis-Burelle, Michael G. Bausher, and Erin N. Rosskopf

presumably prevented farmers from continuing traditional crop rotation, vegetable grafting became a crucial tool to overcome soilborne diseases and other pests. In the 1990s, nearly 60% of open fields and greenhouses in Japan producing muskmelon ( Cucumis

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Luis J. Belmonte-Ureña, Jose A. Garrido-Cardenas, and Francisco Camacho-Ferre

Meloidogyne javanica infection E. Afr. Agr. For. J. 43 4 112 120 Okimura, M. Matsuo, S. Arai, K. Okitsu, S. 1986 Influences of soil temperature on the growth of fruit vegetable grafted on different rootstocks [in Japanese with English summary] Bul. Natl. Res

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Hans Spalholz and Chieri Kubota

Vegetable grafting is the process of combining two compatible seedlings (scion and rootstock) to comprise one new seedling. Grafting onto rootstocks resistant to soilborne diseases can reduce the disease incidence of scion and improve the yield. For

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Shawna L. Daley, William Patrick Wechter, and Richard L. Hassell

Fatty alcohol treatments can be used to eliminate the meristem of cucurbit (Cucurbitaceae) rootstocks, which prevents regrowth when grafting, but the effects of the treatment on the rootstock have not been documented. Two rootstock types, ‘Emphasis’ bottle gourd (Lagenaria siceraria) and ‘Carnivor’ interspecific hybrid squash (Cucurbita maxima × C. moschata) commonly used in watermelon (Citrullus lanatus) grafting significantly increased in cotyledon and hypocotyl size over 21 days after treatment (DAT) with a 6.25% fatty alcohol emulsion. There was a significant increase in total soluble sugar (glucose, sucrose, and fructose) content for each rootstock hypocotyl and cotyledon. Starch concentrations of hypocotyls and cotyledons also increased significantly in both rootstocks. This increase in stored energy could greatly increase the success rate of the grafting process. Increased rootstock energy reserves could overcome the need for keeping the rootstock cotyledon intact when grafting.

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Richard L. Hassell, Frederic Memmott, and Dean G. Liere

Ruralcaja Morra, L. 1997 L'innesto erbaceo coltura per coltura Colture Protette. 5 17 22 Suzuki, M. Sasaya, S. Kobayashi, K. 1998 Present status of vegetable grafting systems Japan Agr

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Angela R. Davis, Penelope Perkins-Veazie, Richard Hassell, Amnon Levi, Stephen R. King, and Xingping Zhang

. López-Galarza, S. Guardiola, J.L. 2004 The grafting of triploid watermelon is an advantageous alternative to oil fumigation Scientia Hort. 103 9 17 Muramatsu, Y. 1981 Problems on vegetable grafting [in

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Po-Lung Chia and Chieri Kubota

morphology of tomato rootstock seedlings. Vegetable grafting has been widely used worldwide to obtain resistance to soilborne pathogens and pests ( Kubota et al., 2008 ). Methyl bromide fumigation has been limited by the Montreal Protocol. As a result

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Shawna L. Daley, Jeffrey Adelberg, and Richard L. Hassell

Application of fatty alcohol to rootstocks used for vegetable grafting has been shown to increase the efficiency of producing grafted transplants by controlling cucurbit (Cucurbitaceae) rootstock meristematic regrowth and by allowing the rootstocks to accumulate carbohydrates, especially starch, over time in the hypocotyl and cotyledon. A grafting experiment was conducted to determine the effect of increased carbohydrates on survival of watermelon (Citrullus lanatus) grafts using standard grafting procedures. ‘Carnivor’ interspecific hybrid squash (Cucurbita maxima × C. moschata) and ‘Macis’ bottle gourd (Lagenaria sicereria) rootstocks at 1, 7, 14, and 21 days after fatty alcohol treatment were grafted with ‘Tri-X 313’ seedless watermelon using the one-cotyledon method. Graft survival on ‘Macis’ rootstock was acceptable or significantly increased up to day 14, with a slight decrease at day 21. Graft survival on ‘Carnivor rootstock was also acceptable up to day 21, with a significant increase between days 1 and 7. The second experiment was conducted to determine whether the increased carbohydrates provide sufficient energy to successfully graft without the rootstock cotyledon, a method that has previously shown inconsistent results. Graft survival was improved by 90% using treated ‘Carnivor’ rootstock 7 days after fatty alcohol treatment and ‘Macis’ rootstock 14 days after fatty alcohol treatment. Adoption of the hypocotyl-only graft method in commercial production may increase efficiency by better using greenhouse space and could decrease disease probability by removing the cotyledons before grafting.

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Douglas Cox

leaves take significantly more time than a semester for visible shoots to appear. I was pleased with the chapter on vegetable grafting because it is a practical, sustainable method of disease control and yield enhancement used locally, so the students can